Added 9. Palindrome Number

Author: berkslv

javascript/9-Palindrome-Number.js

@@ -0,0 +1,24 @@
+/**
+ * @param {number} x
+ * @return {boolean}
+ */
+var isPalindrome = function (x) {
+
+    // Creates array from int characters
+    // 121 -> [1,2,1]
+    let arr = Array.from(String(x), Number);
+
+    // Uses two pointer
+    for (let i = 0; i < arr.length; i++) {
+        if (arr[i] !== arr[arr.length - 1 - i]) {
+            return false;
+        }
+    }
+
+    return true;
+};
+
+
+// Runtime: 302 ms, faster than 40.50% of JavaScript online submissions for Palindrome Number.
+// Memory Usage: 51.8 MB, less than 8.36% of JavaScript online submissions for Palindrome Number.
+